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Technical Specifications
Last Updated: 2026-11-05
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | SB9039 |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
37.50 oz-in
2.70 kg-cm
0.3 N-m
4.8V
34.73 oz-in
2.50 kg-cm
0.2 N-m
Above Average
|
| Speed |
6.0V
0.13 sec/60°
461.5 deg/s
76.9 RPM
4.8V
0.14 sec/60°
428.6 deg/s
71.4 RPM
Below Average
|
| Physical | |
| Weight | 0.44 oz12.5 gAverage |
| Dimensions |
L 0.886 in W 0.453 in H 0.969 in L 22.5 mm W 11.5 mm H 24.6 mm |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Metal |
| Gear Spline/Teeth | 21 T |
| Rotation Mode | Positional |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 40° |
| Dead Band | 3 µs |
| Angle Sensor | Potentiometer |
| Control System | SBUS |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Temperature | -20–60 °C-4–140 °F |
| Connectivity | |
| Connector | Futaba J |
| Wire Length | 215 mm8.46 in |
| Origin | |
| Country of Origin | China |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Class Comparison
| Torque | Above Average Stronger than 67% of 349 Digital Micro servos at 4.8V |
| Speed | Below Average Faster than 23% of 347 Digital Micro servos at 4.8V |
| Weight | Average Lighter than 39% of 597 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.46–0.53 W |
| Power Density | 1.373 W/in³ More power-dense than 35% of 563 Digital Micro servos |
| Torque Density | 2.7784 oz-in/g Stronger than 64% of 349 Digital Micro servos |
| Torque-to-Volume Ratio | 89.41 oz-in/in³ Denser torque than 65% of 345 Digital Micro servos |
| Speed-to-Weight | 0.57143 (1/sec·g) Faster than 30% of 347 Digital Micro servos |
| Speed-Torque Trade-off | 4.86 Better balanced than 71% of 345 Digital Micro servos |
| Torque Gain per Volt | 6.65%/V More voltage-responsive (torque) than 3% of 290 Digital Micro servos |
| Speed Gain per Volt | 6.40%/V More voltage-responsive (speed) than 2% of 295 Digital Micro servos |
| Voltage Range Width | 1.2 V Wider voltage range than 20% of 496 Digital Micro servos |
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